Add charmcraft.yaml debug_mode to charmed-osm

- Added a debug_mode option to lcm, mon, nbi, pol, and ro charms
- Added a script to prepare pods for debugging:
  - setup .ssh/config to easily ssh from vscode to the pods
- Added a README that explains how to prepare the environment for
testing

Change-Id: Ieb56b565c15e61c68ad000b60897abd27e1eeb0e
Signed-off-by: David Garcia <david.garcia@canonical.com>
diff --git a/installers/charm/pol/src/charm.py b/installers/charm/pol/src/charm.py
index 727ffbe..d1341c1 100755
--- a/installers/charm/pol/src/charm.py
+++ b/installers/charm/pol/src/charm.py
@@ -85,7 +85,13 @@
 
 class PolCharm(CharmedOsmBase):
     def __init__(self, *args) -> NoReturn:
-        super().__init__(*args, oci_image="image")
+        super().__init__(
+            *args,
+            oci_image="image",
+            debug_mode_config_key="debug_mode",
+            debug_pubkey_config_key="debug_pubkey",
+            vscode_workspace=VSCODE_WORKSPACE,
+        )
 
         self.kafka_client = KafkaClient(self, "kafka")
         self.framework.observe(self.on["kafka"].relation_changed, self.configure_pod)
@@ -156,5 +162,26 @@
         return pod_spec_builder.build()
 
 
+VSCODE_WORKSPACE = {
+    "folders": [
+        {"path": "/usr/lib/python3/dist-packages/osm_policy_module"},
+        {"path": "/usr/lib/python3/dist-packages/osm_common"},
+    ],
+    "settings": {},
+    "launch": {
+        "version": "0.2.0",
+        "configurations": [
+            {
+                "name": "POL",
+                "type": "python",
+                "request": "launch",
+                "module": "osm_policy_module.cmd.policy_module_agent",
+                "justMyCode": False,
+            }
+        ],
+    },
+}
+
+
 if __name__ == "__main__":
     main(PolCharm)